Sales Tax, Tax Credits and Other Receivables (Tables)
3 Months Ended
May 31, 2021
Receivables [Abstract]  
Sales tax, tax credits and other receivables
    May 31, 2021     February 28, 2021  
Sales tax   $ 935,883     $ 1,155,504  
Research and development tax credits     500,345       435,467  
Other receivables     115,474       172,864  
    $ 1,551,702     $ 1,763,835